<div class="box box-info" style="width:500px;margin:50px auto">
    <div class="box-header with-border">
        <h3 class="box-title">用户登录</h3>
    </div>
    <!-- /.box-header -->
    <!-- form start -->
    <form class="form-horizontal">
        <div class="box-body">
            <div class="form-group">
                <label for="signin-username" class="col-sm-2 control-label">用户名</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" id="signin-username" placeholder="请输入用户名">
                </div>
            </div>
            <div class="form-group">
                <label for="signin-password" class="col-sm-2 control-label">密码</label>

                <div class="col-sm-10">
                    <input type="password" class="form-control" id="signin-password" placeholder="请输入密码">
                </div>
            </div>
        </div>
        <!-- /.box-body -->
        <div class="box-footer">
            <!-- <button type="submit" class="btn btn-default">Cancel</button> -->
            <button type="submit" class="btn btn-info pull-right" id="user-signin">登录</button>
        </div>
        <!-- /.box-footer -->
    </form>
</div>